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om 9' m nw u A d e t n e 3 P Z N E W H i & S N E R R G N Z 9 5 8 0 6 m NLUCK.

(Application filed Mar. 4, 1898.)

(No Modem #(J hw inventors By XWM Attorney.

Witnesses 110: NORRIS PETERS co, Puoraurua, WASNINGTON. u. c.

turns hrarns Familiar Utmost NICHOLAS GIRRENS AND JAOOB H. WVEITZ, OFBUFFALO, NEWV YORK.

Lock.

srnerrrea'rron forming part of Letters Patent no; 608,592, tr u a 9,1898. Application filed March 4, 1898. Serial No. 672,513. (NomodeL) Toall whom it may concern/.

Be it known that we, NIcHoLAs GIRRENS and J ACOB H. "WEITZ, citizens ofthe United States, residing at Buffalo, in the county of Erie and Stateof New York, have invented certain new and useful Improvements in Locks,of which the following is a specification.

Our invention relates to an improved lock and key therefor; and theprincipal object is to provide a lock, having means for preventing thewithdrawal of an ordinary key after the same has been introduced toretract the bolt, with a novel form of key having a movable bit portionwhich cannot be trapped or fastened in the lock against withdrawal.

It also relates to various details of invention, all of which will befully and clearly hereinafter described and claimed, reference being hadto the accompanying drawings, in which- Figure 1 represents a sideelevation of the lock, the removable side portion being re moved toexpose the interior, a section being taken through our improved key onor about line a a, Fig. 4. Fig. 2 represents an outside view of thelock. Fig. 3 represents an inverted reversed side view of the same. Fig.4 represents a side elevation of the key. Fig. 5 represents areversedjsid'e elevation of the Fig. 6 represents a side elevation ofthe key, the pivoted portion of the key-bit being turned over to exposethe spring for holding it in its open position.

Referring to the drawings in detail, 1 represents theinclosing case of.the lock, the front plate 2 being removably secured 'to the same in theusual way by screws 3. The locking-bolt 4c is constructed in the usualway and kept in alinement, while free to be moved back and forthlongitudinally, by means of the slots or openings 5 and 6 and thestation ary guide-piece 7. The portion 8 is attachedto the plate 4:,which lies under the bolt 4 and slides back and forth with it.

through the slot or opening 6 far enough to engage with the tumblers 9,as will appear farther on.

10 represents a spring for forcingthe bolt forward when released fromthe tumblers. The tumblers are mounted on a pivot 11 and are eachprovided with a spring 12 for keep- It extends up ing them normally intheir downward position.

v The tumblers 9 are each provided with the usual opening 13 andinward-extending portions ltand 15 for engaging with the pin 8 when thebolt is being moved in looking or run locking. The tumblers 9, eitherone or more, are also provided with a trap -opening 16,

which, While it will trap and hold an ordinary key, will neither trapnor hold our improved and novel form of key, as will be describedfarther on. In the drawings we have shown but two tumblers 9, but anynumber more or less may be employed.

17 represents a knob by which thelock may be operated from the insidewithout a key.

18 represents aportion of the tumblers, of the required shape to enablethe same key belonging to the lock to disengage another key that mayhave been trapped therein, the dotted lines 19 representing the keywhich has been put in the inside keyhole 20 for that purpose orillustration.

21 in Fig. 2 represents the outside keyhole, used when unlocking orlooking the lock.

The key used with this look is shown in Figs. at, 5, and 0, also in Fig.1, where the pivotal or movable bit portion is turned 0r bent at anangle, illustrating the means by which the key is removed from thelock-trap. It is provided with a pivotal bit portion 22, adapted to turnto one side only, the shoulder 23 preventing its turning in thedirection. The spring 24 (shown in Figs. 5 and 6) serves to retain thekey and its movable bit portion in its normal condition and returns thesaid bit portion to said condition immediately after its removal fromthe trap, as shown in Fig. 1.

While our improved key is primarily designed for use in the locks ofpatrol-boxes to obviate the necessity of a patrolman carrying two keys,it is also adapted to be used with other locks.

It will be noticed that the tumblers are formed at 18, (see Fig. 1,) sothat the same key that operates the lock (shown by dotted lines 19 inFig. 1) willlift said tumblers and release a key that may be trapped inthe opening 16, the inside keyhole 20 being used for that purpose.

We claim as our invention 2 eos,592

1. In a lock the combination with a trapping-tumbler, of an ordinary keyadapted to be trapped thereby and a releasing-key for releasing saidordinary key, said releasingkey having a pivoted bit portion adapted toenter the trap of the tumbler and release itself therefrom by themovement of the pivoted bit portion.

2. In a lock, the combination with the tumblers having trapping-slotsfor trapping and preventing the Withdrawal of an ordinary key, of a keyhaving a pivoted bit portion adapted to enter the trapping-slots andoperate the lock and also to release itself therefrom by the turning ofthe bit portion upon its pivot.

3. In a lock, the combination with the operating mechanism havingdevices for trapping an ordinary key, of a key similar in form to theordinary key and having a pivoted bit portion which turns on its pivotto one side only, and is adapted to enter the trapping devices andoperate the tumblers to retract the bolt upon the rotation of the key,said key being released from the trapping devices upon its rotation inthe reverse direction by the pivotal movement of its bit portion.

4:. A key having a portion of its bit hinged to the remainder andadapted to turn or swing sidewise thereon, a shoulder for preventing itsside movement in one direction, and a spring for normally retaining saidhinged portion in proper position for operating a lock.

NICHOLAS GIRRENS. JACOB H. WEITZ.

\Nitnesses:

G. A. NEUBAUEB, JAMES SANGSTER.

